Machine for making paper.



N. H. CARPENTER.

MACHINE FOR MAKING PAPER.

APPLICATION man mm! 2a. 1915.

Patented Sept. 21, 1915.

3 SHEETSSHEE1 I N. H. CARPENTER.

MACHINE FOR MAKING PAPER.

APPLICATION men MAY 28. 1915.

Patented Sept. 21, 1915.

3 SHEETS-SHEET 2.

N. 1-1. CARPENTER,

MACHINE FOR MAKING PAPER.

APPLICATION FILED MAY 28. I915.

Patented Sept; 21, 1915.

Maw

3 SHEETS-SHEET 3.

11 E Caz pen??? NATHAN H. CARPENTER, 01E COSHOCTON, OHIO.

momma FOR MAKING PAPER.

Application filed May 28, 1915. Serial No. 81,001.

To all whom it may concern:

Be it known that I, NATHAN H. CARPEN- TER, a citizen of the UnitedStates, residing in Coshocton, in the county of Coshocton and State ofOhio, have invented certain new and useful Improvements in Machines. forMaking Paper, of which the following is a specification. r t

This invention relates to paper making machines in which the wet paperpulp is received from a making wire or from a making cylinder 'by a feltor apron which conveys it through press rolls and suction apparatus to adrier, and the object of the invention to to provide press rolls andsuction apparatus of improved construction,

and improved apparatus for holding the felt and paper carried thereby inproper relation to the drier, and for transferring the paper web fromthe felt to the drier.

The invention especially relates to machines for making crape paper andother light weight papers, in the manufacture or which heretoforeconsiderable diificulty has 'been experienced in conducting the wet webof paper from the F ourdrinier wire or from the making cylinder to thedrier.

In carrying out my invention I provide a felt or apron which is ledthrough press rolls one of which is rubber covered and is heldadjustably and with yielding pressure against the other roll which ismounted in stationary bearings and is provided with suction devices forexhausting the Water from the paper web. From the combined press andsuction rolls the felt passes to a pair of drawing rolls, one of whichis mounted yieldingly in adjustable bearings and from the draw rolls thefelt passes over guides which are made adjustable to vary the tension ofthe felt. From these adjustable guide rolls the felt passes to suitablewhipping or cleaning devices and then proceeds back to that part of themachine from which it receives paper pulp. The paper leaves the feltbefore the latter passes through the draw rolls, and in order tofacilitate the transfer of the wet paper web to the first dryingcylinder, I provide a ten sion roll, mounted in suitable bearings, andprovided with a lever or handle, by means of which it may be movedtoward and from the drier and so held as to the paper web to the driernear its polnt of transfer to the first drying cylinder. In

Specification of Letters Patent.

open.

. known form, past a .whip or cleaning device properly present IPatented Sept; 21, 1915.

order to,facilitate in this transferfI pro- "vide a blow-pipe which iscarried by the toward the drying cylinder.

In the accompanyin drawings :'Figure 1 1s a s1de elevation 0 so much ofa paper making machine embodying my invention as is necessary toillustrate my improvements. Fig. 2 is a detail view, in section, andwith parts broken away, of the combined press and suction "rolls. Fig. 3is a detail view, on an enlarged scale, showing the mechanism forholding the felt in proper relation with the first drying cylinder andthe devices for transferring the paper web to the drier. Fig. .4 is adetail view, partly, in elevation, partly in section, an with partsbroken away, of the blow-pip em ployed by me" for transferring web tothe drier. Fig. 5 is a view on an enlarged scale, and in section on theline 55 of Fig. 4, showing the blow-pipe slot blow-pipe slot closed.Fig. 7 is a detail view, showing how my improvements are applied to amachine of the Fourdrinier type. Fig. 8 is a detail view in plan,showing the mechanism for varying the speeds of the press rolls, drawingrolls, anddriers. The machine shown in Fig. 1 is, generally speaking, ofwell knownv construction. The felt A passes from the cylinder machine B,equipped with a cylinder B and coucher b as usual, through press rolls Cto draw rolls D and thence over guide rollers E, of well F to thecylinder machine. The uide rolls E are provided with devices of wellknown construction, for adjusting the tension of the felt. The drawrolls D comprise a lower roll d mounted in stationary bear ings, and anupper rolld mounted in bearings on levers d pivoted at d and carryingadjusting screws d, the lower ends of which bear on springs d whichexert an upward pressure on the arm and hold the upper roll ms with ayielding pressure on the lower one. The lower press roll a is preferablyrubber covered and is mounted in hearings on levers c pivoted at a andcarrying adjusting I screws 0*, which extend into spring boxes up ner asto force the paper web from the felt the paper Fig. 6 is a similar viewwith the b rolls, through which the paper passes from' the makingmachine, remove suflicient water from thewet paperweb to prepare it forthe drier. The rubber covered press roll presses the wet felt and thewet web firmly against the upper press roll ands'erves to squeeze outsome of the water and moisture and to most efliciently present the wetweb to the suction apparatus.

From the press rolls the felt carries the paper to the driers J, whichmay be of any usual form. Between the press rolls and the dryingcylinders is interposed an adjustable tension roll K which serves tohold the felt in proper relation to the first drying cylinder to permitthe transfer of the paper to said cylinder; The roll K is mounted inbearings in a frame consisting of swinging arms L attached to a shaft Zfrom which extends a lever or handle L equi ped with adjusting devices Zby means 0 which it may be. held inany desired position. As shown inFig. 3 the roller K serves to bend the felt opposite the first drier andthere hold it at the desired distance from the drier. For the purpose oftransferring the paper web fromthe felt to the drier, I provide ablow-pipe M which is mounted in the frame of the tension roll K and ismovable therewith toward andfrom the drier. This pipe serves to blow thepaper away from the felt into contact with the drier. It is preferablyof the construction shown in Figs. 4, 5 and 6, for a purpose hereinafterto be explained.

An outer pipe member m is closed at opposite endsby screw caps m m andit incloses an lnner pipe member m the ends of which are also closed bysaid caps.

N indicates an air supply pipe which extends into the inner pipe memberand is provided. with a retaining head n. The opposite end of the innerpipe member is provided with a head n carrying the stem of a hand-wheelO which is used to turn and thus adjust the inner pipe member relativelyto the outer one. The outer pipe member is formed with a slot :0 whichmay be of uniform width, while the inner pipe member is formed with aslot of varying width, one portion y being relatively wide andterminating in a shoulder 3 while the remaining portion 12 of the slotis tapered. By this arrangement the size of the air passage from theblow-pipe may be varied. By this construction the blow-pipe may beadjusted to operate on paper webs of different widths or on thecomparatively narrow end of the paper web when starting the operation.The construction is also such that the width of the air opening may bevaried at will and the length of this opening can be adjusted to suitall conditions.

In Fig. 1 I have shown my improvements applied to a cylinder machine.

driving shaft -T, geared tothe upper press roll at t and belted to thelower draw roll at t. The belt passes around a cone pulley t on theshaft T and around a cone pulley t on the shaft to the lower drawv roll.By this well known mechanism the speed of the draw roll relatively tothat of the press roll may be varied. The variable speed drier is drivenby a belt U, passing over a cone pulley u on a shaft u, geared to thedrying cylinder J By means of this mechanism the speed of the drier maybe varied to suit any conditions which may exist at any time.

In the manufacture of crape paper, the web of paper pulp is allowed topass with I speeds of the different rolls I provide a at the point ofcontact between said rolls the web of paper leaves the felt and sticksto the top metal draw roll, and passes around said roll until it comesin contact with a doctor plate V which serves to crinkle the paper weband causes it to slide off of the draw roll and descend by gravity tothe variable speeddrier which by the mechanism before described can beadjusted to run at any desired speed to stretch the paper web before itis dried.

It will be observed that in my machine a single felt is employed whichsimplifies and cheapens the construction and facilitates in theoperation of the mechanism. The combined press and suction rolls havebeen found to be most efficient in preparing the paper web for thedrawing operation, while the adjustable tension roll associated with thefirst drier cylinder is most useful in properly locating the paper Webrelatively to the first drier at the point of transfer, and theblow-pipe operates with certainty to move the paper toward the drierduring the transferring operation.

I claim as my invention:

1. In a paper-making machine, the combination of an endless felt orapronwhich receives the wet pulp, draw rolls engaging the felt anddriving it, and a pair of press rolls between which the felt passes withthe paper web, one of which is profrom the felt and pulp, and the otherof which is pressed yieldingly against the comwater from the felt andpulp, and the other of which is pressed yieldingly against the combinedpressand suction roll.

2. In a paper-making machine, the combination of an endless felt orapron which receives the wet pulp, draw rolls engaging the felt anddriving it, means for adjusting the pressure of the draw rolls, a pairof press rolls between which the wet felt passes with the plup, one ofwhich is provided with suction mechanism for drawing water bined pressand suction rolls, and means for adjusting the pressure exerted by said.rolls on the felt and paper.

3. In a paper-making machine, the combination of an endless felt whichreceives the wet pulp, draw rolls engaging the felt and driving it, apair of press rolls between which thewet felt passes with the paper,means for adjusting the pressure exerted between the press rolls, meansfor adjusting the pressure exerted between the draw rolls,

and mechanism for driving the press rolls and draw rolls provided withdevices for varying the speed of the draw rolls relatively to that ofthe press rolls.

nation of a elt, a drier mounted to move in proximity to the felt, aroller engaging the felt near the drier, and means for adjusting theposition of said roller to vary the distance between the felt and thedrier at the point of transfer of the paper from the felt to the drier.i

6. In a paper-making machine, the combination of a felt, a drier, ablow-pipe associated with the drier and serving to blow through the feltand cause the paper web to move therefrom into contact with the drier.

7. In a paper-making machine, the combination of a felt, a drier, ablow-pipe associated with the drier and serving to blow through the feltand cause the paper to pass therefrom to the drier, and means foradjusting the. position of the blow-pipe relatively to the drier.

8. In a paper-making machine, the combination with the felt of a drier,a roller bearing on the felt near the drier, means for adjusting theposition of said roller relatively to the drier, and a blow-pipe movablecoincidently with the roller for blowing through the felt and causingthe paper web to engage the drier.

9. In a paper-making machine, the combination with the felt, of a drier,a blow-pipe associated with the drier and serving to blow through thefelt and cause the paper Web to be transferred to the drier, and meansfor adjusting said blow-pipe to vary the area of its active opening.

10. In a paper-making machine, the combination with a felt of a drier,and a blowpipe associated with the felt and drier to cause the paper webto pass from the felt to the drier, said blow-pipe being provided with aslottedopening and equipped with means for varying thewidth and lengthof said opening for the purpose specified.

11. In a paper-making machine, the combination of combined press andsuction rolls, draw rolls, a felt conveying the paper web from the pressrolls to the draw rolls, a variable speed drier and a doctor bladeoperating to strip the paper web from the draw rolls, crinkle it anddeliver it to the variable speed drier.

In testimony whereof, I have hereunto subscribed my name.

NATHAN H. CARPENTER.

Witnesses:

MARY WIMMER, MADELINE SOHAEFFLER.

